- PL/SQL
- April 5, 2025
Understanding XMLType In Oracle Database.
XMLType is used to store and manipulate XML data. You can use XMLType to define database columns and PL/SQL variables…
- Architecture
- January 14, 2021
Understanding LOCKING In Database
CONCURRENT access is accessing same data by multiple users at the same time. • SHARED lock is acquired when user…
- Architecture
- December 13, 2020
Understanding TRANSACTIONS In Database
What Is A Transaction ? Transaction is logically joining multiple SQL statements (unit of work) which we can either commit/rollback.In…
- PL/SQL
- November 23, 2020
PL/SQL Collection Methods
WHAT IS COLLECTION ? A collection is a data structure that acts like a list or a single-dimensional array of…
- Architecture
- November 8, 2020
Understanding FLASHBACK Technology
In Oracle database,under SGA there is an optional memory component known as – Flashback buffer.When Flashback Database is enabled, the…
- Performance Tuning
- November 1, 2020
Understanding INVISIBLE Index
By default an index is VISIBLE.The Oracle optimizer will pick only VISIBLE index. Oracle 11g allows indexes to be marked…
- Performance Tuning
- November 1, 2020
Understanding UNUSABLE Index
By default an index is USABLE.The Oracle optimizer will pick only USABLE index. Oracle indexes can go into a UNUSABLE…